Why is our universe fine-tuned for life?

This is a really interesting TED talk by Brian Greene. I don't think I need to introduce him. He is arguably the most well-known popular science writer. He is famous for his book "The Elegant Universe" which was made into one of the most popular science documentaries on television by the same name. It was this documentary, and the book later, that introduced me to the  wonderful world of physics and I owe it to Brian for my current interest in physics.

In the years after The Elegant Universe, Brian wrote two other popular science books, "The Fabric of the Cosmos" and "The Hidden Reality"; the former has been made into a science documentary by the same name.

Though I have only mentioned his achievements as a popular science author, it should be noted that he is a distinguished scientist who has contributed a lot to the theoretical understanding of the superstring theory. He is currently a professor of physics and mathematics at Columbia University.

In this TED talk, Brian wonderfully describes the results that led to last year's Nobel Prize in Physics and how string theory might be useful in understanding Dark Energy. If string theory has to explain Dark Energy, it needs to invoke the concept of Multiverse and Inflation theory, which Brian explains in a language fit for laymen. Finally, he uses all the arguments that he makes during the talk and attempts to answer the most fundamental question in physics today "Why is our universe fine-tuned for life?" Interesting talk and a must watch!